[sdiy] Korg Delta problem

[sleepy_dog at gmx.de]

Gordonjcp wrote:
> On Mon, Jun 18, 2018 at 10:01:45PM +0200, Jean Bender wrote:
>> thanks !
>> you mean the caps from the power supply ? How could the power supply
>> only disturb or make no functionnal only half part from the synth ?
> You'll never find "bad caps" in a synth.  They're pretty much a myth.
>
How so? Is it a myth that electrolytic caps will chemically degrade?
I have been told by more than one EE not to bother using electrolytics 
that have been laying around for 5 years, not just for things requiring 
low ESR, not for anything.

I don't have any numbers. But even in some simple old synth PSU with a 
pair of fat caps and linear regulation, it would be bad if those caps 
got a huge ESR and reduced capacitance, no? Now I can imagine that this 
is considered in the circiut designs, but only so much?